Combined typewriting and computing machine



Sept. 11, 1923. I 1,467.569

F. U. CQNARD I COMBINED TYPEWRITING AND COMPUTING H ACHINE Y Filed March 24, 1921 a Sheets-Sheet i Sept. 11, 1923.

F. U.. CONARD COMBINED TYPEWRITING AND COMPUTING MACHINE Filed March 24, 1921 3 Sheets-Sheet 2 22...... HPJIZZZF-ZZZ 1. OOOOOOQQQ 000000000 0000 Q0 v oooooooo ooo oooooo \noooooooo W QMW by I Af/or ey Sept. 11, 1923. 1,467,569' 1 F. U. CQNARD COMBINED TYPEWRITING AND COMPUTING IACHINE Filed March 24, 1921 3 Sheets-Sheet 5 //7 van/0r: I

Patented Sept. 11, 1923.

UNITED STATES PATENT OFFICE.

FREDERICK U. CONARD, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD COM- PUTING- MACHINE COMPANY, OF NEW YORK, N. Y A CORPORATION OF NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Application filed March 24, 1921. Serial No. 455,205.

To all whom it may concern.

Be it known that I, FREDERICK U. CON- ARI), a citizen of the United States, residing in Brooklyn Borough, in thecounty Kings, city and State of New York, have invented certain new and useful Improvements in Combined Typewriting and Computing Machines, of which the following is a specification:

This invention relates to combined typewriting and computing machines, and is disclosed in connection with an Underwood bookkeeping machine, which may comprise one or more registers or totalizers, each provided with a plurality of dial-wheels driven by computing bars, each computing bar being rovided with indexing pins or devices which are settable by the numeral type-keys. A general operator is actuable to cause the computing bars to run the setup number into the register. The set-up indexing devices are restored to their normal positions at the return-stroke of the general operator.

The invention relates principally to means to prevent overthrow of the dial-wheels, which is mainly due to the momentum of the computing bars. To this end, there is provided an arrester to engage directly with the computing bars. This arrester may comprise a bar extending crosswise beneath the computing bars in position to be engaged by the set-up indexing devices, as the computing bars complete their advancestrokes. v 7

Since the machine may add 'or subtract, the arrester is provided at units place with a yieldable device, which, during an addition operation, ofiers suflicient resistance to overcome the momentum of the units computing bar. Durin' a subtraction operation, however, the yie dable device is moved, and permits an;additional step of movement of the .units'computing bar, so that an extra digit is run in, to compensate for the mathemati-' cal error of one in the units position, which is characteristic of the complemental method of subtraction used in this machine.

The indexin pins or devlces are pro- V vided with spring detents to hold them in normal inefl'ectivepositions. Sometimes a detent becomes weak, thus causing the associated indexing pin to be accidentally set while another indexing pin is being set on the same computing bar. The shockimparted to the computin bar by the pin being set is sometimes su cient to cause the indexing pin with a defective detent to drop.- Thiscauses "an erroneous computation, and, since the set indexing pins are restored to their normal positions at the returnstroke of the general operator, it is diflicult, upon investigation, to locate the cause of the erroneous computation. Another advantage or feature of the invention is the prevention of a recurrence of error when due to a defectlve indexing pin detent. This may be done by obstructing the movement of the general operator, to prevent the operation of the pin restoring means, so that, upon investigation, the two pins will be found .set on the computing bar, thus disclosing the reason for the erroneous computation.

This obstruction of the general operator is effected by any two pins which accidentally become set up on any computation bar. The rear pin is engaged b the general operator and is thereby cause to advance the computation bar or rack. The other set-up pin on said bar is arrested by the aforesaid arrester, thusprematurely stopping the. particular computation bar and also the general operator, which is hence unable to complete its cycle of movements. The general operator may be driven by an electric motor, and there may be provided an auxiliary switch in the motor-circuit which may be automatically opened, to prevent the motor from burning out when the movement-of the general operator is obstructed as just explained.

To facilitate the removal of a computing bar -in order to replace a defective detent mine the normal position of the arrester 0r overthrow-preventing bar relative to the path of travel of the indexing pins.

Other features and advantages will hereinafter appear.

In the accompanyin drawings, Figure 1 is asectiona l side view of the ma chine, all of the typewriter except the numeral type-keys being omitted.

Figure 2'is a sectional detail view of the auxiliary switch-operatin mechanism.

Figure 3 is a top plan View of the computin machine, some of the parts being omitted.

Figure 4 is a detail side view showing one. of the computing bars arrested in its operated position by the overthrow-preventing bar.

igure 5 is a view showing a portion of a computing bar prematurely arrestedin its forward movement with twoindexing pins set thereon.

Figure 6 is a view similar to Figure 5, butshows the com uting bar prematurely arrested duringt e return movement thereof.

Figure 7 is a perspective view of the overthrow'preventing bar.

Figure 8 is a diagrammatic electric circuit.

Number-keys 10 art provided to operate key-levers 11 to type the number on the typewriter. The number ma also be set up or indexed on computing e ements or bars 12, preparatory to running it into dial-wheels 13 of a register 14, three registers being shown in the present machine. 1

The computing bars of each register are arranged in denominational order, and each one is provided with a group of indexing devices or pins 15 having values from 1 to 9, inclusive, the pins of equal values of view of the the various computing bars forming rows extending crosswiseof said computing bars (Figure 3), each row of pins being located behind a pin-setting bar 16 connected to be depressed by a rock-shaft 17, there bein one rock-shaft for each pin-setting bar 16. ach rock-shaft 17 has an arm 18 at its forward end to be actuated by a stem 20 depending from the keylever 11, Each computing bar 12 may be given a preliminary movement to a pin-setting position, by denomination-selecting mechanism, which may be like that disclosed in the patent to Hart, No. 1,287,301, dated December 10, 1918, The denomination-selecting mechanism may comprise thrust-bars 21 to be operated individually by the typewriter carriage, as the latter passes through a computing zone, each thrust-bar 21 being effective to operate a pivoted lever 22 engaging with a transposition linkage 23 to operate a bell-crank 24 and move the associated computing bar 12 forwardly to bring its indexing pins 15 under the pin-setting bars 16, so that, when any one of the numeral-keys is depressed, the indexing pin 15 of corresponding value is set through the medium of the associated pinsetting bar, each com uting bar being provided with a spring not shown), as in the Underwood bookkeeping machine, to restore it to its normal position while the typewriter carriage passes to the next lower deefi'ective indexing .pins.

nominational position to advance the com-" computing bars 12, forwardly distances cor responding to the value of the depressed or The computing bars 12 are provided at their forward ends with racks 27 meshing with pinions 28 associated with the dial-wheels 13 to rotate the latter through distances proportional to-the movement of the computing bars; the numerals on the peripheries of the dial-wheels being readable through a sight opening 29 in a front cover plate 29 for theregisters.

The general operator may be actuated b a handle 30 on a rock-shaft 31, the rock-she t having two gear sectors 31 secured thereto, which mesh with intermediate pinions 32 engaging racks 33, formed on guide-bars 34 of the general operator to reciprocate or cycle the latter, the crossbar 26 being secured to the guide-bars 34 by brackets or arms 35. j

The general operator may be reciprocated by an electric motor 36 instead of the handle 30. The motor may be normally at rest and may be started manually, or automatically as indicated in the patent to Thornton, No, 1,283,360, dated October 29, 1918, after the last digit is Written in the column. To start the motor manually, there is provided a key 37, which may be depressed against thetension of a return spring 38 to operate a rearwardly extending lever 40, to depress the outer end ofia horizontally-disposed lever 41 extending inwardly from the side of the machine, to raise the inner end of said lever, said inner end being effective to actuate a trip-pin 42 to start the motor and render a clutch 39 effective. The trip-pin 42 is pulled out of the path of an ear 43 on a clutch-element or disk 44 carried by studs 45 extending through slots 46 in said clutchelement 44, the studs 45 being secured to a disk 47. The disk 47 is fixed to a" shaft 48, which may be driven by the motor 36 through a worm 50 on a driving shaft 51 connected with the motor, the worm driving a worm-wheel 52 loosely mounted on the shaft 48, so that the motor may rotate independently of said shaft when used for other purposes. When the trip-pin 42 is raised, the disk 44 is given a preliminary movement by aspring (not shown}, to effect a connection between the worm-wheel 52 and motor circuit.

the shaft 48 and also start the motor by' closing a switch 53 (Figure 8).

To effect the connection of the shaft 48 with the worm-wheel 52,'the disk 44 is provided with studs 54, which, by the preliminary movement of the disk 44, are moved to allow pivoted pawls 55, on the disk 47, to

engage a ratchet-wheel" 56 rigidly securedto the worm-wheel 52 to couple the shaft with the motor. To close the switch 53, the disk 44 is provided with a lateral extension 57 (F igures land 8), which normally engages a contact spring 58 of .the switch 53in the Said extension is moved out of engagement with the contact spring 58 by the preliminary movement of the disk 44 to start the motor. The shaft 48 is then rotated to drive the general operator to run the indexed number into the register. The switch is automatically opened to stop the motor upon the completion of a revolution of'the disk 44 when the extension 57 re-engages the contact spring 58. The

clutch mechanism and the switch-operating mechanism including the disk 44 may be like that disclosed in thepatent to Wood,

engaging in a. block 62, which slides up and down in a slot 63, formed in a cross-head 64 of a slide 65, as the shaft 48 rotates, thus moving the cross-head 64 forwardly and backwardly, the cross-head carrying slide 65 being guided by a horizontal rod 66 sup rted in bearings 67 at each end thereof. The cross-head 64 is provided at its upper end with a projection or arm 68 engaging a fork 70 secured to one of the guide-bars 34'of the general operator 25. Thus, it will be seen that when the motor makes a revolution, the general operator 25 is reciprocated,.

or, in other words, is caused to make a cycle, the forward stroke of the general operator being effective to drive the computing bars 12 to run in the indexed number, the rearward stroke of the general operator being effective to restore the computing bars to their normal positions; the computing. bars being provided for this purpose with pro jections 71 which are engaged by the crossbar 26 of the general operator on its return stroke. The indexing pins 15 are restored by in-restoring mechanism" including a platiorm 69 which is actuable by the general operator during the latter part of its return stroke, as shown. in the above-mentioned Hanson atent.

It will be un erstood that, when the general operator is to be reciprocated by the opera-ting handle 30, the motor drive may be disconnected by lowering the projection 68 of the cross-head out of engagement with the fork'70 on the guide-bar of the general 0 erator, as-disclosed in the patent to Hart,

o. 1,212,895, dated January 16, 1917." When the number is run into the register, there is a tendency for the dial-wheel 13 to overthrow, which is due to the momentum attained by the computing bars, espe- 1 cially when the motor is used to drive the general operator. To prevent the overthrow of the dial-wheels, there is provided means to overcome the momentum of the computing bars when they reach their operated positionsf To this end, there may be employed a relatively fixed cross-bar 71 which may be located in the path of the depressed indexing pins 15, and positioned, a distance equal to the thickness of an indexing pin, in front of the extreme forward positlon of the cross-bar 26 of the general operator, to arrest the computin bars in their operated positions (Figure 4 thus overcoming any tendency of the computing bars to over throw the dial-wheels.

The driving connections between the pin:

ions 28 and the dial-wheels 13 may be like those shown in the above-mentioned Hart patent, No. 1,287,301, to allow the computing I ars 12 and their associated pinions28 to be returned to normal positions, while the dialwheels are held in their operated positions by spring-operated detents 72. The dialwheels are very light, so as to reduce to a minimum the tendency to overthrow due to their own momentum. Any such tendenc which is-very slight, if at all appreciable, 1s

overcome by the detents 72.

' The computing bars 12 are arranged side by side in denominational order (Figure 3), as previously stated, the computing bar of units order having associated therewith a complement bar 73 which is inefi'ective during additive computations, and is rendered effective when the machine is set for subtraction, so that the units computing bar 12 may be moved forwardly one digit distance farther than the distance determined by the set indexing pin, to compensate for the usual mathematical error of one in the units position, which is characteristic of the complemental method of subtraction, said method being used in the present machine. The complement bar 73 may be like that disclosed in the above-mentioned 'Thortonatent, No. 1,283,360, and is provided with 3 ip 74 to engage the set indexing pin on the units computing bar to drive the latter, the complement bar being actuable through the intermediary of a settable lever 75 thereon, which isengaged' by the cross-bar 26' of the general opera-tor.

To permit the increased movement of the units computing bar 12 during a subtraction operation, the overthrowreventing meanscomprising'the bar 71 is yleldable at the units computing bar. To this end, there may be provided a stop 76, which may be held in position by'a spring 77 to maintain its engaging face 78 in alignment with the stopping edge or engaging face 80 of the overthrow-preventing bar 71, the tension of the spring 77 being ordinarily sufficient to overcome the momentum of the units com uting bar during an addition operation. uring a subtraction operation, however,

the stop 76 is moved by the depressed index ing pin on the units computing bar against the tension of the spring 77 said stop 7 6 engaging finally with a second stop 81 formed on the cross-bar 71.

The yieldable stop 76 may be U-shaped.

(Figure 4:), and is carried by a plunger '82 slidably mounted in said bar 71, the stop 76 embracing the bar 71 and being thus guided by the latter. a

As hereinbefore stated, the invention is v illustrated in connection with a three-register machine. It willbe understood, however, that the invention may be used in connection with any number of registers. Each register is provided with a complement bar, and connormal or ineffective positions by detents.

which may be like those shown in the patent to Hart, No. 1,270,411, dated June 25 1918. Each detent may comprise a ball 85 (liigure 4), pressed by a spring 86 into a groove 87 in the associated indexing pin 15. In practice, it sometimes happens that a deltent s ring becomes weakened, and,'as a result, t e associated indexing pin may be'accidentally set, which may be due to the shock imto parted to the computing bar while another indexing pin is being set thereon, thus causing two indexing pins to be set on a single computing bar. It has alsobeen found that the 9 pin, which is depressed when the machine is set to subtraction and which is automatically retracted while another pin is being set on the computing bar, fails to be retracted, due to an improper adjustment of the 9 pin-retracting mechanism (not Either of the above-menshown' herein). tioned conditions causes an erroneous computation to be run into the register, and the be repeated several times before detected y the typist.

To prevent an error resulting from the setting of more than one indexing pin-on a computing bar at the'same time from being transferred to the register, there'is provided means to interfere with, or, other words, block the operation of the machine, so as to necessitate the defect to be remedied. to

menace this end, the foremost one of the two set indexmg pins may engage with the overthrowpreventing bar 71, thus arresting the general operator, which drives the computing bar through the medium of. the other set indexing pin, before the general operator makes a complete cycle. Thus, the machine is stalled and the cause may be readily located upon investigation, since the indexing pins will be found in their depressed positions, due to the fact that the pin-restoring platform 69 has not been operated, which results from the general operator being arrested before completing its cycle.

The stopping of the general operator while the motor circuit is closed would ordinarily cause the burning out of the motor. To prevent this, however, there may be provided in the motor circuit an auxiliary switch 90 (Figures 2 and 8), which ma be automatically opened b mechanism w ich may belike that shown in the a plication of A. G. Kupetz, No. 417,389, file October 16, 1920. The auxiliary switch 90 may comprise a switch-lever 91 normally held in its eflective osition against a terminal 92 by a lever 93; en the neral operator is blockeu, the worm-whee? continues to rotate, and, consequently, the

worm 50 feeds itself rearwardl due to en gagement with the worm-whee 52, to move the driving shaft 51 therewith against the tension of a sprin 94. The forward end of the driving sha t 51 is rovided with a flange 95 (Figures 2 and 8 to engage the upper end 96 of an intermediate lever 97 upon the rearward movement of the shaft 51,

tomove the lever 93 out of the path of the switch-lever 91, to permit said switch-leverto be swung away from the terminal or contact 92 b means of a spring 98, thus opening the e ectric circuit and stopping the mo- It will be understood that, if an indexing pin with a defective 'detent spring shoul drop in front of the overthrow-preventing bar, the return movement of'the computing bar is stopped (Figure 6), the general operator is arrested and the motor 13 stopped.

After the defect which causes an erroneous computation has been remedied, the auxiliary switch may again be closed by moving the switch-lever behind the lever 93.

The cover plate 29, provided for theregisters 14, may be detached from the casing 99 to permit the removal of the computing bar 12 in order to replace the defective detent spring 86, the computing bar being removable by pulling it forwardlyout of themachine. I

To permit the depressed indexing pin of the defective detent sprhigv to pass the overthrowpreventing bar while removing a computing bar 12, the said overthrow-preventing bar may he pivotally mounted to 52 is arrested, the motor two rearwardly-extending arms 100 on a rod 101 forming part of the pin-restoring mechanism associated with the platform 69, so that the bar may be swung downwardly out of the path of the depressed indexing pin. A spring 102 (Figures 1 and 7) is effective to hold the overthrow-preventing bar 71 in its normal eflective position, said bar 71 being provided with a stop 103, which may be carried thereby, to enga e a bar 104 secured to a front plate 105 0 the frame 106 which' sup- 4 ports the key-operated rock-shafts 17. The

stop 103 may be in the form of a screw threaded into the overthrow-preventing bar 71, so that the latter may be adjusted relatively to the path of travel of thedepressed indexing pins 15. A check-nut 107 maybe provided to hold the stop in its set position.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination with ;a register having denominationally-arranged reciprocating computing elements, of settable indexing devices on each computing element, means to actuate fsaid reciprocating computing elements through various distances, and normally effective means to co-operate with the indexing devices to arrest the computing elements in their operated positions, the ar- 'resting means being settable to inefiective condition to permit further advanceof acomputing element after such arrest.

2. The combination with a register having dials, of driving elements connected with said dials, means to actuate'said driving ele- 'ments to turn said dials, and normally efiective means to engage the driving elements to arrest them in their operated positions, the arresting means being settable toinefi'ective condition to permit further advance of a driving element after such arrest. -v

3. The combination with a register having number-bearing elements, of settable driving elements for said number-bearing elements, means to actuate said driving elements to drive said number-bearing elements, and a device normally in effective condition to engage the driving elements to arrest the latter in various operated positions, the arresting device, being settable to ine'fiective condition to permit further advance of a driving element after such arrest.

4. The combination of a register having dials, detents for said dials, driving elements, onefor each dial, settable indexing devices on each drivin element, means to actuate said driving e ements, a universal bar with which the set indexing devices of the various driving elements mayengage to arrest said driving elementsin their actuated positions, and means for normally holding said universal bar in efiective position but yieldable to permit movement of the universal bar to ineffective position to permit further advance of the arrested driving elements. i

5. The combination with a register having dials, of driving elements, one for each dial, a group of indexing devices on each drivin element, key-operated means to set the indexing devices, an actuator to operate the driving elements, and means, normally in effective condition, to arrest the driving elements in their operated positions, the indexing devices of each driving element having values from 1 to 9, inclusive, and being arranged varying distances away from the arresting means according to their values, the set indexing devices engaging with the arresting means to arrest the driv- 6. The combination of a register comprising computing elements, an actuator for said computing elements, a group of settable indexing' devices on each computing element.

the indexing devices havin values from 1 to 9, inclusive, said in exing devices determining the extent of actuation'of the computing elements, and means, normally in effective condition, to engage the set indexing devices to arrest the computing elements in their actuated positions the arresting means being settable to inefl ective position to permit further movementof the'arrested computing elements. v

7. The combination of a register having a dial, a computing bar associated with said dial, settable indexing pins on the computing bar, means to actuate the computing bar through the intermediary of anyone of the indexing pins to'drive' the dial, and means normally in position to engage the set indexing pin to arrest the computing bar upon reaching the end of; its driving movement, the arresting means being shiftable to permit further movement of the arrested com puting bar. i 8. The combination of a register com rising dials, computing bars to drive said ials, a general operator comprising an-engaging portion to actuate said computing bars, a group of settable indexing devices on each computing bar, and means normall in position to engage the set indexing evices on the various computing bars to arrest the computing bars in their actuated itions,

the arresting means being shiftab e to in-' effective position at will to permitfurther advance of the arrested bars.

9. The combination of a register comprising computing bars, a general operator comprising an engaging portion to actuate mid computing bars, a group of settable indexing devices oneach computing bar, the inor r daring devices having values from 1 to 9, inclusive and being arranged to be engaged sooner or later according to their values by the engaging portion of the general operator, the general operator having always the same extent of'movement irrespective of the movement of the computing bars, and a universal bar arranged slightly in 'advance of the extreme actuated positionof the engaging portion of the general opergtor, said universal bar engaging with the set indexing devices to prevent overthrow of the computing bars in their operated positions, said universal her heing normally in efiective position but shiiteble at will to ineffective position.

10. The combination of e register having dials, driving elements for said dials, s general operator for said driving elements, indexing means for eachdrivin element to determine the extent of actuation of the driving elements b the general operator, end moons nor-incl y in eiiective condition to engage the driving elements to arrest them in their operated positions to prevent overthrow of the dicls end setteble at will to permit further movement of the orrested driving elements.

ll. lhe combination of c register hsving computing elements, settoble indexing viws on esch computing element, moons to computing elements, and

co erste with, the indexing devices to arrest the computing elements in their operpcsitions end to determine the extent of movement of said computing elenients, the arresting moons heing resilient at one off the computing elements to permit it to he moved tnrther under certoin conditions then "the distonce determined by the set indozing device,

it The combination of o register having coneputin elements, settohle indexing devices each computing element, means to soid compntin elements, means to coopernte with the indexing devices to orrest computing elements in their opersited positions, the computing elements being errenged in denominational order, and e resilient element associated with said arresting'mecns and arranged to be engaged by the units computing element, seid resilient eleheing norinelly effective to arrest the computing element and efilective to yield cc Join conditions to permit the units 'e 'nent to move erther rely hy menses ments being arranged side by side in denominetional order, the arresting means being yieldcble at the units computing element to permit the units computing element to be driven one digit distance farther under certain conditions.

14. Zl'he combination with a register havingn dial-wheel, oi adriving element tor the dial-wheel, settable indexing devices to determine the extent of actuation of the driving element, an actuator for the driving element, a stop normsll z eflective to arrest the driving element, seid driving element be ing efiective to be driven farther under certein conditions then the distance determined by a set indexin device, and a second stop to arrest the driving element when moved throu h the increased distance.

15. he combination with o register hove computing. element, of settoble indexing devices on said computing element, on sotustorfor the computing element, a stop normally efiective to errest the computing element, on intermediete element which he rendered effective to he engegcd by the actuator to drive the computing element ferther than when soid computing element is engaged directly by the cctuotor, snid' stop being yieldeble to permit the increased movement of the computing element, e 5 second stop to arrest the computing element when the letter is actuated through the medium of the intermediate element.

16. In it computing machine adopted to odd or subtract, the combination of e regls- 10o ter hcving computing elements, a group of scttoble indexing devices on each computing element, on sctustor to sdvonce the compnting elements, mesns overcome the menturn of the computing elements wh they reach their advanced positions, said computing elements being arranged side bv side in denominstionol order, n device eitective during e subtracting operation to ndvonce the units computing element on incrcosed distance, and a. yieldoble element associeted with the momentum-overcoming means to permit the increased movement of the units computing element.

17. In a computing machine adopted to add or subtract. the combination of s register hnvin dial-wheels, computing bars drive sci dial-wheels, s group of settahle ill;

indexing devices on said computing bars, ectnetor to cdvnnce the compntin hers,

element associated with the stop-bar and located at the units computing bar to permit the increased movement of the latter.

18. The combination of a register comprising a computing element, indexing devices,

I motor," intermediate mechanism to be op- I erated by said motor to drive said computing element after one of the indexing devices has been set thereon, a switch for said motor, and means to cause said switch to be opened to render said motor ineffective when more "than one indexing device is set on the com puting element.

20. The combination of a register comprising a computing element, indexing devices on said computing element, said indexlng devices being settable one at a time, a motor, intermediate mechanism to be operated by said motor to drive the computin element after one of the indexing devices has been set thereon, means to obstruct the movement of the computing element when more than one indexing device is set thereon, and means to render said motor ineffective when the move ment of said computing element is obstructed.

21. The combination of a register comprising a computing element, indexing devices on saidcomputing element, said indexing devices being settable one at a time, an electric motor, intermediate mechanism to be 0perated by said motor to drive said computing element after one of the indexing'devices has been set thereon, a motor circuit,- a switch in the motor circuit, means to close said switch to start said motor, a normally closed auxiliary switch in the motor circuit, means to obstruct the movement of the computing element when more than, one indexing device is set thereon, and means to open the auxiliary switch to stop the motor when the movement of the computing element is obstructed.

22. The combination of a register comprising a computing element, indexing devices on said computing element, said indexing devices being settable one at a time, an actuator for said computing element, means to cycle sald actuator, and means to prevent a complete cycle of said actuator when the computing element is operated with more than one indexing device set thereon.

23. The combination of a register comprising a computing element, indexing devices on said computing element, said indexing devices being settable one at a time, an actuator for I said computing element, means to cycle said actuator, and means to arrest the computing element, when it is operated with more than one indexing device set thereon, and thereby prevent a complete cycle of said actuator.

24. The combination of a register comprising computing elements, a group of indexing devices on each computing element, the indexing devices of each group being settable one at a time, a motor, intermediate mechanism to be operated by said motor to drive said computing elements after the indexing devices are set on the various computing elements, and means to arrest the computing elements in their operated positions, said means being'efi'ective to render the motor ineffective when more than one indexing device is set on any one of the computing elements.

25. The combination of a register comprising computing e1ements,a group of indexing devices on each computing element, the indexing devices of each group being settable one at a time, a'motor, intermediate mechanism to be operated by said motor to drive .said computing elements after the indexing devices have been set on the various comput ing elements, and a cross-bar to engage the set indexing devices to arrest the computing elements in their operated positions, said cross-bar bein effective to render themotor inefi'ective w en more-than one index- 100 ing device is set on any one of the computing elements.

26. he combination of a register comprising a computing element, indexing devices o said-computing element, an actuator 105 for said computing element, said indexing devices being settable one at a time to determine the extent of movement of said comuting element, means operable to restore the set indexing devices at the end of the cycle 11o of the actuator, and means to prevent the restoration of the indexing devices when more 7 than one is set on said computing element. i

27. The combination of a re 'ster com-' prising a computing element, in exing pins 116 on said computin element, an actuator for said computing e ement, said indexing pins being settable one at a time to determine the extent of movement of said computin ele: ment, a pin-restoring element operab e by 120 said actuator to restore the set indexing pin at the end" of the cycle of the actuator, and means to prevent thecomplete cycle of the actuator t prevent the actuation of the pinrestoring element when more than one in- 126 dexing pinis set on the computing" element.

28. T e combination of a register having a dial-wheel, a computing element to drive said dial-wheel, settable indexing devices to actuate said computing element, and means to engage any one of the indexing devices to arrest the computing element in various operated positions, said means comprising a bar, and a spring to retain said bar in its eiiective position,,said bar being movable to an ineffective position against the tension of said spring to a position out of the path of the set indexing device.

29. The combination of a register having dial-Wheels, computing bars to drive said dial-Wheels, a general operator comprising an engaging portion to actuate said computing bars, a group of settable indexing devices on each computing bar, the indexing devices of each group having values from 1 to 9, inclusive, and being arranged to be engaged sooner or later according to their values by the engaging portion of the general operator, the general operator having always the same extent of movement irrespective of the movements of the computing bars, a universal bar arranged slightly in advance of theextreme actuated position of the engaging portion of the general operator, said universal bar engaged by the set indexing devices to prevent overthrow of the computing bars in their operated positions, and a spring to retain the universal bar in "its effective position; said universal bar being pivotally mounted, so that it may be swung out of the path of the indexing devices and against the tension of said spring.

30. The combination With a register having a dial-Wheel, of a settable computing element to drive said dial-Wheel, means to actuate said computing element, a device to engage the computing element to arrest the latter in various operated positions, said device comprising a bar, and a spring to retain said bar in its efiective position, said bar being movable to an inefiective position against the tension of said spring, and an adjustable stop a ainst which said bar may be urged by sai sprin FREDERICK U. CONARD. Witnesses:

EDITH B. Linear, JENNIE D. Tr-roann. 

